该句式的基本结构是：expect sth of sb。其被动式就是sth is expected of sb。如：

Good conduct is expected of students in school.  学生在校应当操行良好。

You have signally failed to do what was expected of you. 希望你做的事你显然并没做。

They showedcommitment to the job above and beyond what was expected of them.  他们的敬业精神超乎人们对他们的期望。

对于被动形式的sth is expected of sb 来说，如果其中的sth为不定式，则在句首使用形式主语it，将不定式移至句末，即为 Itis expected of sb to do sth。如你的句子：

It isexpected of him to see the play.=To see the play is expected of him. 希望他去看看这出戏。